LIST OF ILLUSTRATIONS. 
PLATE 
Peep eeyaramiceMining Malakoft Digoings: ..........0s...c..0.0cccceclecoeececccesccdaccecee Frontispiece. 
B. Distribution of the Volcanic Formations and Gravel over a portion of Placer and Eldo- 
Bsa NE Bat INA PEE NE RM un oho) fo cdi naa eka ilescds¥aved@acseoue. to face page 82 
C. Distribution of the Volcanic and Gravel Formations, near Placerville ...... es 98 
D. Diagram showing the position of the Table Mountain Lava-Flow, of 
SD SU ee ‘ 132 
E. Sections of Table Mountain, and near Soulsbyville.....................0..0..... S 134 
F. Sections of Table Mountain, and near Little York........................ between 136 and 137 
G. Diagram showing elevations of Pliocene and Present American and 
Yuba Rivers, and Sections near La Porte and Red Dog ............ - 344 and 345 
Sumreeenuare tvenervorr, Central Dam 2.52... 23<cecceusancecereessavcesccedecacesacccactacee to face 198 
errparaaie Mmounimne, Malakoff Diggings  ................cicescesecseenscececsosnacscececese - 202 
K. Section and Plan of Spanish Creek Gravel Deposit ..........0..0. 0. cc cceceeecececeees = 216 
MTN AUR VERS OME oS. voices eddecsicreeecscncseccetscccesedotes saree between 268 and 269 
era on the extarisville Gravels  ... 2.6... 26.66. ccccevcaedevnesebebesceshedive = 380 and 381 
N. Sections of Gravel at Boston Mine, Pearl’s Hill, Mooney Flat, ete................... to face 382 
O. Map and Sections of Blue Tent Mines, and Sections at Sailor Flat and Camden 
Se SE ae ee a Re, ee ... between 412 and 413 
P. Sections at Indian Hill, Chicken Point, and in Dutch Flat District .............. to face 418 
Q. Map of the Mining District adjacent to Forest City ..... 0.........ccccclecee cece eee ‘s 432 
R. Map of the Region drained by Slate, Cafion, and Goodyear Creeks.................. = 444 
S. Plan of Bald Mountain Mine, Sections near La Porte, Portwine, etc. between 448 and 449 
ee neniees anetmemon Hoar Gibsonville ©... 2 ice tidece es. eescdcesneececus saveecceesesucs to face 450 
U. Map of Poverty Hill, Scales’s Diggings, and Vicinity .............5.....0..ecccececees *i 452 
V. Sections at Brandy City, Bear Hill, Eureka, Gopher Hill, Cherokee, etc. between 462 and 463 
i mia ce che eamearian bill Gravel Mines 2.2.6.6... 0.0c0cc see scoteesseceecensedcnecesess to face 474 
X. Sections of Oroville Table Mountain, and Diagram of Davis Point Gravel ......... i 484 
> Map of Vicruity of Oroville Table Mountain .....................c0ccceee cee i “A 480 
Map showing the Extent of the Hydraulic Mining Operations near Gold Run, Dutch Flat, Little 
York, You Bet, Chalk Bluffs, Red Dog, Hunt’s Hill, and Quaker Hill, on Bear River and 
Caiion, Steep Hollow and Greenhorn Creeks. 
Map of the Tertiary Auriferous Gravel Deposits lying between the Middle Fork of the American 
and the Middle Yuba Rivers, including the Principal Hydraulic Mining Region of the State 
(in two sheets). 
